CUSE_ALLOC_UNIT_SHIFT
return ((n << CUSE_ALLOC_UNIT_SHIFT) + remainder);
m = howmany(size, 1 << CUSE_ALLOC_UNIT_SHIFT);
n += howmany(a_cuse[n].size, 1 << CUSE_ALLOC_UNIT_SHIFT);
MAP_SHARED, f_cuse, n << CUSE_ALLOC_UNIT_SHIFT);
min_off = (mem->alloc_nr << CUSE_ALLOC_UNIT_SHIFT);
(CUSE_ALLOC_UNIT_MAX << CUSE_ALLOC_UNIT_SHIFT) /* bytes */